Don't know, wouldn't be bad.ATMega1284 <$6 at Mouser.10 boards ~$25 from itead studiocaps, resistors, leds in the pennies each range.ft232rl $4.50headers, shop aroundpower connector, crystal, can be had from dipmicro.com like 30 cents eachregulators are like 65 cents

Put in DIP cause that's the part that usually get smoked! Also folks can do development, programming, pull it out & build into standalone item.X3 lets FT232 be used to bitbang a bootloader into the parthttp://www.geocities.jp/arduino_diecimila/bootloader/index_en.htmlCan likely be left off with wide availabilty of AVR programmers such ashttp://www.mdfly.com/index.php?main_page=product_info&cPath=5&products_id=415

Looks like plenty of room that thruhole parts could be used for many parts instead, make assembly easier.FTDI chip only available as SMD.The Rx/Tx LEDs are driven by the FTDI chip, user does not have control there. I've often thought of just leaving the FTDI chip & part off and gluing a part like this onto the board instead, http://www.ebay.com/itm/USB-2-0-TTL-UART-6PIN-Module-Serial-Converter-CP2102-/290643946254?pt=LH_DefaultDomain_0&hash=item43abbaab0e(Hey look at that, right from Boston too)that would lower the cost as well.

maniacbug

I've often thought of just leaving the FTDI chip & part off and gluing a part like this onto the board instead, http://www.ebay.com/itm/USB-2-0-TTL-UART-6PIN-Module-Serial-Converter-CP2102-/290643946254?pt=LH_DefaultDomain_0&hash=item43abbaab0e(Hey look at that, right from Boston too)that would lower the cost as well.

Wow that's cheap! Yeah, I would leave it off. The normal route is get an FTDI cable or a breakout board from Sparkfun. The thing is, you only need as many FTDI chips as you want to have units connected to the computer at once. Putting them on every board is BOM waste, IMO.

Actually I made a mistake in my post, I used the '644 initially and the SD library does assume the Sanguino mapping in this case. There's no specific mapping in Sd2PinMap.h for the ATmega1284, it falls back to using the mapping for the ATmega328, ie SPI on D10-D13 (ie PORTB2-PORTB5). The ATmega1284 needs PORTB4-PORTB7.

'1284 DIP version of Duemilanove with options for USB/Serial interface PCB is ready!Will take shields, and has 2 hardware serial ports and 12 additional IO (2 more analog/digital, 10 digital) than a '328. Can have an FTDI Basic/FTDI Cable plugged temporarily plugged on for downloading sketches,Can have one of these from Mouser put on for permanent usehttp://www.mouser.com/ProductDetail/mikroElektronika/MIKROE-483/?qs=sGAEpiMZZMuNcqZxhMNT3znYT0k8AsjHor none at all, up to the user.The '1284 pins are broken out per maniacbugs Arduino mod here, select Bobuino as the board type.https://github.com/maniacbug/mighty-1284pOnly a couple of surface mount parts - the regulators and the USB polyfuse.50 boards available if you want some.Prices shipped to US locations, mailed in letter size envelopes for qtys 1, 2, 3, and small boxes in qty 4 & above due to size & stacked thickness.